MFSA-RESERVE-2025-1958350
First published: Tue Apr 29 2025(Updated: )
A process isolation vulnerability in Firefox stemmed from improper handling of javascript: URIs, which could allow content to execute in the top-level document's process instead of the intended frame, potentially enabling a sandbox escape.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Thunderbird | <138 | 138 |
| Firefox ESR | <115.23 | 115.23 |
| Mozilla Thunderbird | <128.10 | 128.10 |
| Firefox ESR | <128.10 | 128.10 |
| Firefox | <138 | 138 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1958350
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-31/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-30/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-32/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-29/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-28/
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of MFSA-RESERVE-2025-1958350?
The severity of MFSA-RESERVE-2025-1958350 is high due to its potential for a sandbox escape.
How do I fix MFSA-RESERVE-2025-1958350?
To fix MFSA-RESERVE-2025-1958350, upgrade to the latest version of affected Mozilla products.
Which versions are affected by MFSA-RESERVE-2025-1958350?
Versions prior to Thunderbird 138, Firefox 138, and their ESR equivalents are affected by MFSA-RESERVE-2025-1958350.
What products are affected by MFSA-RESERVE-2025-1958350?
The affected products include Mozilla Thunderbird, Firefox, and their ESR versions.
What causes the vulnerability in MFSA-RESERVE-2025-1958350?
MFSA-RESERVE-2025-1958350 is caused by improper handling of javascript: URIs leading to process isolation issues.
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